Home / 72,808.20-109,212.36-20,217.68

Finding the Fourth Proportional to 72,808.20, 109,212.36 and 20,217.68

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Solution

The fourth proportional to 72,808.20, 109,212.36 and 20,217.68 is: 30,326.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,808.20 : 109,212.36 = 20,217.68 : x
  2. Step 2: Convert to fraction form
    72,808.20/109,212.36 = 20,217.68/x
  3. Step 3: Cross multiply
    72,808.20x = 109,212.36 × 20,217.68
  4. Step 4: Simplify right side
    72,808.20x = 2,208,020,546.52
  5. Step 5: Solve for x
    x = 2,208,020,546.52/72,808.20
  6. Step 6: Final answer
    x = 30,326.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.